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authorVincenzo Frascino <vincenzo.frascino@arm.com>2020-03-20 14:53:39 +0000
committerThomas Gleixner <tglx@linutronix.de>2020-03-21 15:23:59 +0100
commitcc56f32f00154ff3586e8346c91f5253882cd8a5 (patch)
tree5810bf32c4facf11e4cfa86337b8b116dfb5dc5c
parent97b01d2eabd8c0fa650a9d513febeae35dbc6de4 (diff)
linux/ktime.h: Extract common header for vDSO
The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Split ktime.h into linux and common headers to make the latter suitable for inclusion in the vDSO library. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200320145351.32292-15-vincenzo.frascino@arm.com
-rw-r--r--include/linux/ktime.h9
-rw-r--r--include/vdso/ktime.h16
2 files changed, 17 insertions, 8 deletions
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index b2bb44f87f5a..1fcfce97a020 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -253,14 +253,7 @@ static inline __must_check bool ktime_to_timespec64_cond(const ktime_t kt,
}
}
-/*
- * The resolution of the clocks. The resolution value is returned in
- * the clock_getres() system call to give application programmers an
- * idea of the (in)accuracy of timers. Timer values are rounded up to
- * this resolution values.
- */
-#define LOW_RES_NSEC TICK_NSEC
-#define KTIME_LOW_RES (LOW_RES_NSEC)
+#include <vdso/ktime.h>
static inline ktime_t ns_to_ktime(u64 ns)
{
diff --git a/include/vdso/ktime.h b/include/vdso/ktime.h
new file mode 100644
index 000000000000..a0fd07239e0e
--- /dev/null
+++ b/include/vdso/ktime.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_KTIME_H
+#define __VDSO_KTIME_H
+
+#include <vdso/jiffies.h>
+
+/*
+ * The resolution of the clocks. The resolution value is returned in
+ * the clock_getres() system call to give application programmers an
+ * idea of the (in)accuracy of timers. Timer values are rounded up to
+ * this resolution values.
+ */
+#define LOW_RES_NSEC TICK_NSEC
+#define KTIME_LOW_RES (LOW_RES_NSEC)
+
+#endif /* __VDSO_KTIME_H */

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